SDProfiler: update readme (commaai#30479)

* update instructions

* fix that

* and that too

selfdrive/debug/profiling/snapdragon/.gitignore

@@ -1 +1 @@
-SnapdragonProfiler/
+SnapdragonProfiler/

selfdrive/debug/profiling/snapdragon/README.md

@@ -0,0 +1,13 @@
+snapdragon profiler
+--------
+
+
+* download from https://developer.qualcomm.com/software/snapdragon-profiler/tools-archive (need a qc developer account)
+  * choose v2021.5 (verified working with 20.04)
+* unzip to selfdrive/debug/profiling/snapdragon/SnapdragonProfiler
+* run ```./setup-profiler.sh```
+* run ```./setup-agnos.sh```
+* run ```selfdrive/debug/adb.sh``` on device
+* run the ```adb connect xxx``` command that was given to you on local pc (if you changed adb path in previous step, run that version of adb)
+* cd to SnapdragonProfiler and run ```./run_sdp.sh```
+* connect to device -> choose device you just setup

selfdrive/debug/profiling/snapdragon/setup-profiler.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# install depends
+sudo apt update
+sudo apt-get install libc++1 libc++abi1 default-jre android-tools-adb gtk-sharp2
+
+# setup mono
+sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+sudo apt install apt-transport-https ca-certificates
+echo "deb https://download.mono-project.com/repo/ubuntu stable-xenial main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
+sudo apt update
+sudo apt-get install -y mono-complete
+
+echo "Setup successful, you should now be able to run the profiler with cd SnapdragonProfiler and ./run_sdp.sh"